Interface Architecture for Fine Grained Polycrystalline Materials by Grain Boundary Control and Design

通过晶界控制和设计的细晶多晶材料的界面结构

• 批准号: 08405046
• 负责人: WATANABE Tadao
• 金额: $ 17.34万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08405046/
• 关键词: fine grained polycrystal; grain bounday chracter distribution (GBCD); grain boundary control and design; electron back scattered diffraction; magnetic field; sintering; magnetostriction; shape memory alloy; 電子線後方散乱回折法; 粒界設計・制御; 界面アーキテクチャー; 微細核多

This project was conducted for development of interface architecture towards innovation in performance of fine grained porycrystalline materials through the grain boundary. control and design. Main results obtained are as follows.1. Development of FE-SEMIEBSP Analysis of Grain Boundary Character in Fine Grained Polycrystalline Materials : We confirmed that a newly developed FE-SEM/EBSP/OIM system made it possible to analyze the grain boundary character in polycrystalline materials having nano-scale grains.2. Control of lntergranular Brittleness : Intergranular brittleness of such polycrystalline materials as molybdenum which is considered as intrinsically brittle material can be improved by control of the grain boundary character distribution (GBCD) and the grain boundary connectivity.3. Application of Magnetic Field for Evolution of Microstructures in Ferromagnetic Materials : Magnetic field was applied to sintering of pure iron compacts for development of controlling techniques of mi … More crocircuitries. As the results, both densification and grain growth are found to be enhanced by the magnetic sintering. Also, bicrystal experiments using a Fe-Si alloy revealed that the grain boundary migration rate was increased by the magnetic field, and that the magnetic anisotropy of the material can provide a driving force for grain boundary migration. in addition, the magnetically sintered iron showed a high performance of magnetic properties comparing with a non-magnetically sintered one.4. Occurrence of a giant strain by magnetic field induced martensite transformation : It was found that a rapidly solidified and annealed ferromagnetic Fe-Pd alloy shows a giant strain ten times as larger as standard magnetostrictive materials ; the giant strain is probably caused by the magnetic field induced martensite transformation. Also, the shape memory effect was demonstrated by removal of the magnetic field. Furthermore, the textured grain structure was found to provide a high response in occurrence of the giant strain to weak magnetic field. Less

该项目的目的是通过晶界开发界面结构，以实现细晶粒多晶材料性能的创新。控制和设计。主要研究结果如下：1. FE-SEMIEBSP的开发细晶多晶材料晶界特征分析：我们证实了新开发的FE-SEM/EBSP/OIM系统使分析具有纳米级晶粒的多晶材料的晶界特征成为可能.晶间脆性的控制：钼等多晶材料被认为是本质脆性材料，其晶间脆性可以通过控制晶界特征分布（GBCD）和晶界连接性来改善.磁场在铁磁材料显微组织演变中的应用：将磁场应用于纯铁压坯的烧结，以发展烧结温度的控制技术。 ...更多信息 crocircuitries.结果表明，磁性烧结可促进致密化和晶粒长大。此外，使用Fe-Si合金的双晶实验表明，晶界迁移率由磁场增加，并且材料的磁各向异性可以提供晶界迁移的驱动力。另外，磁性烧结铁的磁性能比非磁性烧结铁的磁性能高.磁场诱发马氏体相变引起的巨应变的发生：发现快速凝固和退火的铁磁Fe-Pd合金显示出比标准磁致伸缩材料大十倍的巨应变;该巨应变可能是由磁场诱发马氏体相变引起的。此外，通过去除磁场证明了形状记忆效应。此外，织构化的晶粒结构被发现提供了一个高的响应，在发生巨应变弱磁场。少

项目成果

M. Furtkamp, P. Lejcek and S. Tsurekawa: "Grain Boundary Migration in Fe-3wt.%Si Alloy"Interface Science. 6. 59-66 (1998)

M.%20Furtkamp,%20P.%20Lejcek%20and%20S.%20Tsurekawa:%20"晶粒%20边界%20迁移%20in%20Fe-3wt.%Si%20合金"界面%20科学.%206.%2059-66%

B.B.Straumal: "The grain structure of vacuum arc deposited Co thin film" Mater.Sci.Forum. 294-296. 787-790 (1999)

B.B.Straumal：“真空电弧沉积钴薄膜的晶粒结构”Mater.Sci.Forum。

K.Kaneko: "Characterization of grain boundaries of Al-doped sintered β-SiC by both HRTEM and STEM" Mater.Sci.Forum. 294-296. 269-272 (1999)

K. Kaneko：“通过 HRTEM 和 STEM 对掺铝烧结 β-SiC 的晶界进行表征”Mater.Sci.Forum 294-296 (1999)。

Kouichi Kawahara: "High Temperature Deformation Behaviour and Dislocation Structures of β-Silicon Carbides Without and With Sintering Aids(Boron and Carbon)" Proc.of 6th Inter.Symp.on Ceramic Materials & Components for Engines. (in press). (1998)

Kouichi Kawahara：“没有和有烧结助剂（硼和碳）的 β-碳化硅的高温变形行为和位错结构”，第六届 Inter.Symp.on 发动机陶瓷材料和部件论文集（1998 年）。 ）

Tadao Watanabe: "Grain Boundary Engineering in Texured Materials" Proc.the 11th Intern.Conf.on Textures of Materials. 1309-1318 (1996)

Tadao Watanabe：“纹理材料中的晶界工程”Proc.the 11th Intern.Conf.on Materials of Materials。